Fault Diagnosis Method and Application of ESP Well Based on SPC Rules and Real-Time Data Fusion

Table 7

Probability calculation results of working conditions.

Time window (mins)	Working condition type	Probability
Well name: well_001
5	Normal	0.65
	Shaft breakage	0.70
	Tubing leakage	0.85
	Pump plugging	0.75
	Perforation plugging	0.60
	Water-cut rise	0.25
	Wellhead shut-in	0.10
	Reservoir pressure increase	0.40
	Gas influence	0.35
	Pump wear	0.75
	Frequency increase	0.05
	Choke stab	0.00
	Pump reverse	0.50
	Tubing plugged	0.75
60	Normal	0.50
	Shaft breakage	0.55
	Tubing leakage	0.55
	Pump plugging	0.40
	Perforation plugging	0.40
	Water-cut rise	0.15
	Wellhead shut-in	0.15
	Reservoir pressure increase	0.45
	Gas influence	025
	Pump wear	0.55
	Frequency increase	0.05
	Choke stab	0.05
	Pump reverse	0.70
	Tubing plugged	0.65
1440	Normal	0.60
	Shaft breakage	0.90
	Tubing leakage	1.00
	Pump plugging	0.65
	Perforation plugging	0.50
	Water-cut rise	0.25
	Wellhead shut-in	0.20
	Reservoir pressure increase	0.45
	Gas influence	0.85
	Pump wear	0.55
	Frequency increase	0.05
	Choke stab	0.05
	Pump reverse	0.70
	Tubing plugged	0.75
Well name: well_002
5	Normal	0.60
	Shaft breakage	0.35
	Tubing leakage	0.55
	Pump plugging	0.50
	Perforation plugging	0.25
	Water-cut rise	0.45
	Wellhead shut-in	0.10
	Reservoir pressure increase	0.30
	Gas influence	0.20
	Pump wear	0.65
	Frequency increase	0.10
	Choke stab	0.10
	Pump reverse	0.55
	Tubing plugged	0.35
60	Normal	0.40
	Shaft breakage	0.55
	Tubing leakage	0.85
	Pump plugging	0.70
	Perforation plugging	0.35
	Water-cut rise	0.45
	Wellhead shut-in	0.10
	Reservoir pressure increase	0.45
	Gas influence	0.50
	Pump wear	0.80
	Frequency increase	0.00
	Choke stab	0.10
	Pump reverse	0.65
	Tubing plugged	0.65
1440	Normal	0.20
	Shaft breakage	0.75
	Tubing leakage	0.65
	Pump plugging	0.90
	Perforation plugging	0.65
	Water-cut rise	0.45
	Wellhead shut-in	0.10
	Reservoir pressure increase	0.30
	Gas influence	0.70
	Pump wear	0.80
	Frequency increase	0.00
	Choke stab	0.10
	Pump reverse	0.75
	Tubing plugged	0.65
Well name: well_003
5	Normal	0.70
	Shaft breakage	0.90
	Tubing leakage	0.65
	Pump plugging	0.85
	Perforation plugging	0.50
	Water-cut rise	0.55
	Wellhead shut-in	0.35
	Reservoir pressure increase	0.50
	Gas influence	0.80
	Pump wear	0.65
	Frequency increase	0.15
	Choke stab	0.10
	Pump reverse	0.40
	Tubing plugged	0.50
60	Normal	0.50
	Shaft breakage	0.90
	Tubing leakage	0.75
	Pump plugging	0.65
	Perforation plugging	0.40
	Water-cut rise	0.40
	Wellhead shut-in	0.15
	Reservoir pressure increase	0.35
	Gas influence	0.75
	Pump wear	0.55
	Frequency increase	0.05
	Choke stab	0.00
	Pump reverse	0.50
	Tubing plugged	0.55
1440	Normal	0.25
	Shaft breakage	0.90
	Tubing leakage	0.85
	Pump plugging	0.80
	Perforation plugging	0.60
	Water-cut rise	0.45
	Wellhead shut-in	0.35
	Reservoir pressure increase	0.40
	Gas influence	0.80
	Pump wear	0.75
	Frequency increase	0.05
	Choke stab	0.00
	Pump reverse	0.80
	Tubing plugged	0.80
Well name: well_004
5	Normal	0.70
	Shaft breakage	0.45
	Tubing leakage	0.30
	Pump plugging	0.85
	Perforation plugging	0.25
	Water-cut rise	0.30
	Wellhead shut-in	0.20
	Reservoir pressure increase	0.55
	Gas influence	0.70
	Pump wear	0.35
	Frequency increase	0.05
	Choke stab	0.05
	Pump reverse	0.75
	Tubing plugged	0.70
60	Normal	0.60
	Shaft breakage	0.55
	Tubing leakage	0.40
	Pump plugging	0.70
	Perforation plugging	0.65
	Water-cut rise	0.60
	Wellhead shut-in	0.20
	Reservoir pressure increase	0.50
	Gas influence	1.00
	Pump wear	0.75
	Frequency increase	0.05
	Choke stab	0.35
	Pump reverse	0.25
	Tubing plugged	0.70
1440	Normal	0.10
	Shaft breakage	0.70
	Tubing leakage	0.75
	Pump plugging	0.75
	Perforation plugging	0.55
	Water-cut rise	0.50
	Wellhead shut-in	0.20
	Reservoir pressure increase	0.50
	Gas influence	1.00
	Pump wear	0.65
	Frequency increase	0.05
	Choke stab	0.05
	Pump reverse	0.65
	Tubing plugged	0.70
Well name: well_005
5	Normal	0.20
	Shaft breakage	0.55
	Tubing leakage	0.80
	Pump plugging	0.75
	Perforation plugging	0.75
	Water-cut rise	0.45
	Wellhead shut-in	0.15
	Reservoir pressure increase	0.45
	Gas influence	0.75
	Pump wear	0.95
	Frequency increase	0.25
	Choke stab	0.15
	Pump reverse	0.55
	Tubing plugged	0.35
60	Normal	0.30
	Shaft breakage	0.55
	Tubing leakage	0.45
	Pump plugging	0.65
	Perforation plugging	0.75
	Water-cut rise	0.55
	Wellhead shut-in	0.25
	Reservoir pressure increase	0.50
	Gas influence	0.15
	Pump wear	0.95
	Frequency increase	0.25
	Choke stab	0.05
	Pump reverse	0.60
	Tubing plugged	0.65
1440	Normal	0.20
	Shaft breakage	0.85
	Tubing leakage	0.70
	Pump plugging	1.00
	Perforation plugging	0.75
	Water-cut rise	0.55
	Wellhead shut-in	0.15
	Reservoir pressure increase	0.45
	Gas influence	0.85
	Pump wear	1.00
	Frequency increase	0.05
	Choke stab	0.05
	Pump reverse	0.95
	Tubing plugged	0.75